Stacked thermo-optic switch, switch matrix and add-drop multiplexer having the stacked thermo-optic switch

摘要

Cores of an optical waveguide forming a Y-branch structured thermo- optic switch are stacked in a direction perpendicular to a substrate, and a heater is disposed on a clad right above an area where the cores overlap, thereby utilizing a large temperature gradient by the heater in the direction perpendicular to the substrate. The resulting stacked thermo-optic switch is low in power consumption and signal loss and high in extinction ratio.